Template Functions
void smarty_function_name (array $params, object &$smarty)
All attributes passed to template functions from the template are
contained in the $params as an associative
array.
The output (return value) of the function will be substituted in place of the
function tag in the template (fetch() function, for
example). Alternatively, the function can simply perform some other
task without any output (assign() function).
If the function needs to assign some variables to the template or use
some other Smarty-provided functionality, it can use the supplied
$smarty object to do so.
See also:
register_function(),
unregister_function().
Example 15-1. function plugin with output
<?php
/*
* Smarty plugin
* -------------------------------------------------------------
* File: function.eightball.php
* Type: function
* Name: eightball
* Purpose: outputs a random magic answer
* -------------------------------------------------------------
*/
function smarty_function_eightball($params, &$smarty)
{
$answers = array('Yes',
'No',
'No way',
'Outlook not so good',
'Ask again soon',
'Maybe in your reality');
$result = array_rand($answers);
return $answers[$result];
}
?>
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which can be used in the template as:
Question: Will we ever have time travel?
Answer: {eightball}. |
Example 15-2. function plugin without output
<?php
/*
* Smarty plugin
* -------------------------------------------------------------
* File: function.assign.php
* Type: function
* Name: assign
* Purpose: assign a value to a template variable
* -------------------------------------------------------------
*/
function smarty_function_assign($params, &$smarty)
{
if (empty($params['var'])) {
$smarty->trigger_error("assign: missing 'var' parameter");
return;
}
if (!in_array('value', array_keys($params))) {
$smarty->trigger_error("assign: missing 'value' parameter");
return;
}
$smarty->assign($params['var'], $params['value']);
}
?>
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